Hydrocarbon-burner.



R. G. KIRKWOD.

HYDROCARBON BURNER.

APPLICATION FILED Aue.8, I9II.

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Patented June 29, 1915.

G. K RVJQOD, F PITTSBURGH, PENNSYLVANIA.

YD/OCARBON-EURNER,

Application led August 8, 1911. Serial No. 642,977.,

To all 'whom t may concern:

Be it known that l, ROBERT G. Knuwoon, a citizen of the United States, residing at Pittsburgh, county of Allegheny, Pennsylvania, have invented certain new and useful Improvements in Hydrocarbon-Burners, of which the following is a specification.

The present invention relates to improvements in hydrocarbon burners The principal object yoit' the invention is to provide a simple, compact, and eilicient low pressure oil burner which will have a steady and constant velocity of air through a small nozzle supplied from a blower, as a blast for etomizing and blowing the liquid fuel into the furnace; and also a supplemental supply of air through a larger nozzle which is supplied from rthe same source and having the same pressure and greater volume, which may be controlled and regulated, or varied at will, without disturbing the atolnizing blast, to an appreciable degree.

In existing forms of this class of burners, a prevailing objection is the lmpracticabil` ity of regulating the air for combustion without reducing the pressure and volume of air at the mouth of the nozzle and thus preventing the atomizing of the fuel oil. This is an essential feature in hydrocarbon burners of this type, as frequently the occasion arises when the air supply must be regulated for a small fire, or small supply of oil. rl`he oil then cannot be atomized as there is not Vsuliicient air pressure at the end of the nozzle and as a result the oil is forced in drops to the furnace, entailing waste in the fuel. I have produced a device which eleininates these objectionable features of this type of burner, overcomes difficulties in its operation', and enhances the value of these burners to an appreciable extent.

`With these objects in View the invention consists in a hollow casting in the form of a easing fashioned with a plurality of nozzles, an oil supply or feed pipe, an air blast pipe leading from a blower, and independent means for diverting and regulating the lvolume of air for combustion.

The invention further consists in certain novel features of construction and combinations of parte as hereinafter set forth in the specification and more speciically pointed in the claim.

l .ln the accompanying drawings l have .i lustrated one example of the physical embodiments ozsny invention constructed ao-y cording to the best mode I have so far devised for the practical application of the principles thereof, and which has proven highly satisfactory in practice.

Figure l is a vertical central sectional viewof the burner applied to the front wall of a furnace. Fig. 2 is a vertical sectional view on line 9.-3 on F ig. l, and Fig. 3 is a longitudinal sectional view on. line 3 3 Fig. l.

As illustrated in the drawings the casing l is bolted by means of an annular flange 2, to the front wall 3 of a furnace, an opening l being present in said wall to accommodate the open end or mouth of the nozzle 5, which is formed integral with the casing.

In addition to the large nozzle 5, a second and smaller nozzle k6 ywhose walls are projected from the material of the nozzle 5, is cast integral with the casing. Both these nozzles taper and are somewhat restricted toward their open mouths, and an annular space 7 is formed around the inner nozzle. Preferably the nozzles are arranged concentric with each 'other to form a compact struc .ture and provide eiiieiency in operating the burner. At a suitable point, in this instance the lower end of the casing, a tubular extension Skis 'formed to provide a cylindrical chamber 9 which chamber is in open communication with the chamber 'i' of nozzle 5. A corresponding passage or chamber 10, merging with the interior of the inner nozzle 6 and opening into the chamber 9 at point l1, is provided with the outwardly curved wall 12. At its lower end the extension S is enlarged, as at 13, to form an air inlet 14, and the eXtreme lower end. of the extension is threaded for the reception ot the blast pipe 15 which is connected to a suitable fan or blower as a source of supply for the burner. The passage of the blast through chamber 14 is controlled and regulated by a gate valve or dam er 16 which is operable by a suitable Whee or other device, not shown. en this gate valve 16 is wide open, the air under pressure from the blast or blower, rushes into chamber 9 and is free to ccntinue through opening 1l, passage l0, and out through theopen nozzle 6. l'n this inanner the necessary blast for atomizing the liquid fuel is obtained.

lo control and regulate the supply of air for combustion to the bu l' enipioy a second gate valve l? located the chamber 9 and above the opening or orifice 11. By means of the hand wheel 18, (Fig. 3) as an exemplifying device, the gate valve 17 may be positioned to regulate the volume of air for combustion through the chamber 7 thus supplying the oxygen for combustion.

The liquid fuel is forced through an oil, feed pipe 19 which is seated in an extension 20, and said pipe projects forwardly through nozzle 6. An oil supply'pipe 21, connected to a suitable supply, leads to chamber 22 bored in the extension 20 and the entrance of oil to feed pipe 19 is controlled and regulated by the needle valve 23 adapted to coactwith the complementary valve seat 24: formed in the wall of the chamber 22. The usual valve' stem 25, packing gland 26, and hand wheel 27 are employed in conjunction with the valve mechanism.

From the above description together with an inspection of Fig. 1 of the drawing, it is apparent that the blast for atomizing the liquid fuel is passed through the innernozzle, and additional air is passed through 'the outer nozzle, and the liquid fuel lis passed throughthe feed pipe 19. The liquid fuel is atomized to Aan exceedingly fine spray lby the air blast, and the mixed yoil and air are further commingled as they emerge from the open mouth of nozzle 5 and as fuel'elements are forcedinto the furnaceby the combined blast. A

When starting the burner, the oil or liquid fuel from supply pipe 21, is regulated by 'f valve .23 and the air blast 1s supplied through pipe 15. The gate valve'16 is to be fully opened to permit the entire blast of eight or ten ounces to pass through the opening 11, chamber 10, and out through the open mouth of nozzle 6, a omizing the liquid fuel as it emerges from the end of the feed pipe 19.

The fuel supply and the air through gate 17 are regulated with relation to each other to produce desired combustion. For amore intense re a greater quantity of oil and a proportionately increased volume of air, giving larger supply of oxygen for combustion are necessary.- In order to meet these requirements the -oil valve 23 and the air valve 17 are adjusted to proper position. In this manner the fuel elements may be varied and proportioned as desired.

From the abovedescription it becomes obvious that I have produced a burner of this type which fulfils the conditions set forth as the objectsand purposes of my invention. A

Having thus fully described my invention, what I claim as new and desire to 'cover by Letters Patent is An integral casing formed with an inlet pipe having a valve therein, an outlet nozzle, and an outwardly curved back wall between. these members, a blast nozzle in the outlet nozzle with walls projecting from the wall at the rear of the outlet nozzle, and both nozzles having inlet openings in direct communication with the inlet pipe, 'a valve regulating the inlet opening to the outlet nozzle, and an voil feed pipe extended through the blast nozzle.

In testimony whereof I aiix my signature in presence of two witnesses.

M. B. MORRIS, E. A.. THOMAS. 

